WO2011054588A2 - Alimentation basse tension - Google Patents

Alimentation basse tension Download PDF

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Publication number
WO2011054588A2
WO2011054588A2 PCT/EP2010/063877 EP2010063877W WO2011054588A2 WO 2011054588 A2 WO2011054588 A2 WO 2011054588A2 EP 2010063877 W EP2010063877 W EP 2010063877W WO 2011054588 A2 WO2011054588 A2 WO 2011054588A2
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
fuel cell
battery
low
traction battery
Prior art date
Application number
PCT/EP2010/063877
Other languages
German (de)
English (en)
Other versions
WO2011054588A3 (fr
Inventor
Sebastian Maass
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP10754945.3A priority Critical patent/EP2497176B1/fr
Priority to CN201080060154.XA priority patent/CN102668293B/zh
Publication of WO2011054588A2 publication Critical patent/WO2011054588A2/fr
Publication of WO2011054588A3 publication Critical patent/WO2011054588A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/08—Three-wire systems; Systems having more than three wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
    • B60L50/62—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles charged by low-power generators primarily intended to support the batteries, e.g. range extenders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/46—Accumulators structurally combined with charging apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • B60L2210/12—Buck converters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/10—Control circuit supply, e.g. means for supplying power to the control circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/30—The power source being a fuel cell
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

Definitions

  • a circuit comprising a plurality of battery terminals and a terminal pair, the battery terminals and the terminal pair each having a positive pole and a negative pole, the circuit for selectively connecting the battery terminals to the pair of terminals.
  • the circuit comprises switching elements which connect at least two sub-groups of the battery terminals either in series for voltage addition or in parallel connection to the current addition to at least one group and these connect at least one group to the terminals.
  • the subgroups each include one or a plurality of battery terminals, which in turn are galvanic
  • the low-voltage voltage which is required for switching on and off and for supplying the low-voltage components of battery and fuel cell vehicles, can be picked up directly from a single cell pack of a traction battery or the fuel cell.
  • This single cell packet of the traction battery or the fuel cell is dimensioned such that, depending on the operating or charging state, the required voltage between typically 1 1 V and 14.8 V is available. This makes it possible in a particularly advantageous manner to dispense with a high-voltage / low-voltage DC / DC converter and depending on the vehicle design, the saving of a low-voltage battery.
  • the weight of the vehicle is reduced, which positively affects the fuel consumption, and on the other hand space is saved, which can either be exploited by other components or a compact, i. small building vehicle allows.
  • the absence of the low-voltage battery and the high-voltage / low-voltage DC / DC converter means that the low-voltage voltage required to power the 14 V periphery, ie the above-mentioned electrical components, control units, comfort electronics and lighting one or more modules of the traction battery is to tap.
  • the at least one module of the traction battery only provides the energy required for on / off operations, which is so low that the state of charge of this module is hardly changed.
  • the energy for supplying the low-voltage component in the vehicle operation is still provided by a DC / DC converter, this means ultimately made available by the entire traction battery, so that at least the low-voltage battery can be dispensed with.
  • a DC / DC converter For a vehicle equipped with a fuel cell, abandoning the low-voltage battery and the high-voltage / low-voltage DC / DC converter means that in the presence of a traction battery during system on / off, ie when the fuel cell is not or no longer in Operation is a module of the traction battery which takes care of the system.
  • the presence of a traction battery can be assumed as a normal case in a vehicle equipped with fuel cells.
  • Range Extender is understood to mean a system which comprises a large battery from which the traction motor is mainly supplied. In this system, there is a connection of the traction motor, with an aggregate, which gains electricity from chemically stored energy, such as a fuel cell or a combustion engine with a generator that recharges the large battery.
  • switching the system on / off means only a negligible additional load on a module of the traction battery, so that no increased aging is to be expected. If necessary, this can be compensated for by changing the module of the traction battery required for activation or deactivation of the system, so as to ensure that one and the same module is not always loaded.
  • the low-voltage power supply is taken over by a cell stack of the fuel cell stack.
  • This additional load means only a slight change in the state of supply of the corresponding cell stack, which is negligible or can optionally be absorbed by gas supply channels with a larger cross-section. This results in these cells automatically a better gas supply and thus a higher current capacity, compared with the remaining arranged within the fuel cell stack fuel cells.
  • the lowered fuel cell operating voltage which particularly affects small loads, will result in a reduced aging of the additionally loaded cell stack.
  • this includes a low-voltage starter battery for switching on / off, wherein during operation of the vehicle, a supply of electrical low-voltage components from the fuel cell stack. Only a small amount of charging electronics is required for recharging the starter battery with the aid of a stacking module during operation. The starter battery can therefore be very small and, if necessary, be completely replaced by a capacitor.
  • the efficiency of the fuel cell can be improved, since although some of the cells are charged higher and they have a poorer efficiency, but this accounts for the DC / DC conversion losses and the charging and discharging losses of the low-voltage battery. Furthermore, there is no higher aging of the additionally loaded cells in the fuel cell, which is favorable in terms of the achievable life.
  • Figure 1 shows a variant of the solution proposed by the invention implemented on a battery vehicle
  • Figure 2 shows a further embodiment of the solution proposed by the invention implemented on a fuel cell vehicle with traction battery
  • FIG. 3 is an illustration of recessed gas supply channels for better supply of the additionally loaded cells of the fuel cell.
  • FIG. 1 shows an exemplary embodiment of the device proposed according to the invention on a battery vehicle with a traction battery.
  • traction battery or battery is understood below to mean an interconnection of a plurality of battery modules and a battery management integrated therein or separate therefrom.
  • module in the present context is an interconnection of multiple battery cells to understand, a cell or individual cell is a basic unit with the voltage of the respective installed galvanic element.
  • the representation according to FIG. 1 shows that a battery vehicle 10 comprises a traction battery 12.
  • the traction battery 12 comprises in the embodiment variant shown by way of example in FIG. 1 several modules, such as e.g. a first module 14, a second module 16, a third module 18, a fourth module 20, a fifth module 22 and a sixth module 24. Instead of the six modules 14 to 24 listed here, the traction battery 12 can also have a different number of modules contain.
  • the traction battery 12 is assigned a battery management 30.
  • the battery management 30 can be arranged both separated from the traction battery 12; On the other hand, it is also possible, as already mentioned above, to integrate the battery management 30 into the traction battery 12.
  • Each of the electrical connections 26 between the modules 14 to 24 and the battery management 30 comprises a switch 28, which in the illustration according to FIG. 1 only extends between the individual modules 14 to 24 of the traction battery 12 and the battery management 30 is indicated schematically.
  • the battery vehicle 10 has a low-voltage circuit 32.
  • the low-voltage circuit 32 are all electrical components that are operated at a voltage level in the order of between 1 1 and 14.8 V.
  • control devices 34 convenience electronics 36, such as actuators for windows, sunroof and the like to understand.
  • lighting devices 38 are integrated in the low-voltage circuit 32 of the battery vehicle 10.
  • a low-voltage voltage can be generated for switching on and off and for supplying the electrical components 34, 36, 38 of the low pressure circuit 32 in the battery vehicle 10 is needed.
  • This low-voltage voltage is tapped directly from a single one of the modules 14 to 24 of the traction battery 12.
  • the individual modules 14 to 24 are dimensioned such that, depending on the operating state or state of charge, the required voltage is available at the low-voltage level between typically 1 1 and 14.8 V.
  • the device sketched with reference to FIG. 1 can also be used as an alternative to the low-voltage supply for switching on / off operations of the electrical components 34, 36, 38 of the low-voltage circuit 32.
  • This energy required during the activation or deactivation process is so low that the state of charge of the respective module 14 to 24 ensuring the low-voltage supply is scarcely changed.
  • the power for supplying the electrical components 34, 36, 38 of the low-voltage circuit 32 during vehicle operation is furthermore transmitted via a DC / DC converter, ie, finally. lent provided by the entire battery, so that can be dispensed with in this embodiment, at least on a low-voltage battery
  • FIG. 2 shows the device proposed according to the invention, implemented on a fuel cell vehicle.
  • a fuel cell vehicle 50 likewise comprises a traction battery 12 in the embodiment variant shown in FIG. 2.
  • the schematic structure according to FIG. 2 corresponds to a hybrid of fuel cell 51 with traction battery 12 in the form of a full hybrid. Under full hybrid is understood below that this embodiment variant of a hybrid drive takes most of the available power from the fuel cell 51 and the traction battery 12 only serves for buffering. Further development tendencies are that the fuel cell 51 only serves to recharge a suitably larger traction battery 12 in the form of a "range extender".
  • FIG. 2 shows that the fuel cell vehicle 50 in the embodiment variant shown in FIG. 2 contains the traction battery 12.
  • the traction battery 12 comprises the already mentioned in connection with Figure 1 modules, the first
  • Module 14 the second module 16, the third module 18, the fourth module 20, the fifth module 22 and the sixth module 24.
  • each electrical connections 26 extend by means of of the switch 28 can be opened or closed.
  • the fuel cell vehicle 50 comprises a fuel cell 51.
  • Cell stack 54 may also contain a number of cell stacks different from the seven cell stacks shown.
  • the fuel cell vehicle 50 includes the traction battery 12 as shown in FIG.
  • the voltage supply of the electrical components 34, 36, 38 of the low pressure circuit 32 during the activation or deactivation of the components 34, 36, 38 of the low-voltage circuit 32 of one of the modules 14, 16, 18, 20, 22, 24 of the traction battery 12, the voltage supply of the electrical components 34, 36, 38 of the low pressure circuit 32.
  • the fuel cell 51 is not yet in operation and is still unable to deliver voltage.
  • the respectively to be addressed of the modules 14, 16, 18, 20, 22, 24, where the voltage tap by closing the switch 28 via the electrical connection 26 finally has to be made, is dependent on the state of charge of the respective modules 14 to 24 of the traction battery 12th
  • the battery management 30 optionally ensures that one and the same of the modules 14 to 24 is not always used to cover the low energy requirement in the low-voltage circuit 32.
  • the fuel cell 51 As a rule no increased aging is to be expected, therefore it is quite possible to always use the same of the modules 14, 16, 18, 20, 22, 24 of the traction battery 12 in order to save expensive contacts.
  • the respectively to be connected via the battery management 30 to the low-voltage circuit 32 of the modules 14, 24 is addressed by closing the switch 28 of the respective electrical connection 26.
  • the low-voltage supply of the electrical components 34, 36, 38 of the low-voltage circuit 32 preferably takes place during operation of the system from one of the cell stacks 52, 54, 56, 58, 60, 62, 64 of the fuel cell 51.
  • a low-voltage supply can also be effected by one of the modules 14, 16, 18, 20, 22, 24 of the traction battery 12. This additional burden means only a minor
  • the installation of a low-voltage starter battery 68 takes place in such a non-hybridized fuel cell vehicle. In this case, the system is disconnected by position 72, i. the traction battery 12 is non-existent.
  • the low-voltage starter battery 68 When the low-voltage starter battery 68 is provided, it provides the low-voltage level required for switching on / off the electrical components 34, 36, 38. In operation, the low-voltage circuit 32 is supplied via the connection 74 from the respectively addressed cell stack 52 to 64 of the fuel cell 51.
  • Reference numeral 66 designates a charging electronics which is used for recharging the low-voltage starter battery 68 with the aid of the cell stacks 52 to 64 of the fuel cell 51 during operation.
  • the charging electronics 66 is simple and less expensive than a high-voltage / low-voltage converter.
  • the starter battery 68 used in this stripped-down embodiment of the fuel cell vehicle 50 can be very small or, if necessary, can also be replaced by a capacitor 70, as indicated in the illustration according to FIG.
  • a high-voltage / low-voltage DC-DC converter can be saved; in the presence of a traction battery 12, the low-voltage starter battery 68 can also be dispensed with.
  • FIG. 3 shows the formation of recessed gas supply channels for better supply of additionally loaded cells of a fuel cell in stack form.
  • the fuel cell 51 comprises gas supply channels 75 dimensioned differently with regard to their passage cross-section.
  • a gas supply channel 75 is located in a first cross section 78 within a bipolar plate at the anode.
  • a membrane electrode unit 80 is a membrane electrode unit 80 intended.
  • the gas supply channel 75 of the first bipolar plate 76 is formed in a first cross-section 78, which here has a trapezoidal geometry.
  • the gas supply channel 75 has an enlarged second channel cross section 84.
  • a third channel cross-section 88 is formed, to which - separated by a membrane electrode unit 80 - in a second bipolar plate 90 on the cathode side a gas supply channel 75, which has a fourth channel cross section 92.
  • the fourth channel cross section of the gas supply channel 75 see position 92, exceeds the second channel cross section 84 within the first bipolar plate 82 on the cathode side.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Fuel Cell (AREA)

Abstract

L'invention concerne un dispositif et un procédé pour alimenter en basse tension des composants électriques (34, 36, 38) d'un circuit basse tension (32) dans un véhicule à batterie (10) équipé d'une batterie de traction (12) et dans un véhicule à pile à combustible (50) équipé d'une batterie de traction (12) ainsi que dans un véhicule à pile à combustible (50) équipé d'une batterie de traction (12) et/ou d'une pile à combustible (51). La basse tension destinée aux opérations de connexion/déconnexion pour l'alimentation des composants électriques (34, 36, 38) est prélevée sur au moins un module (14-24) de la batterie de traction (12) ou sur un empilement de cellules (52-64) de la pile à combustible (51).
PCT/EP2010/063877 2009-11-03 2010-09-21 Alimentation basse tension WO2011054588A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10754945.3A EP2497176B1 (fr) 2009-11-03 2010-09-21 Alimentation basse tension
CN201080060154.XA CN102668293B (zh) 2009-11-03 2010-09-21 低压电压供应

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009046305.4 2009-11-03
DE102009046305A DE102009046305A1 (de) 2009-11-03 2009-11-03 Niedervolt-Spannungsversorgung

Publications (2)

Publication Number Publication Date
WO2011054588A2 true WO2011054588A2 (fr) 2011-05-12
WO2011054588A3 WO2011054588A3 (fr) 2011-11-10

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PCT/EP2010/063877 WO2011054588A2 (fr) 2009-11-03 2010-09-21 Alimentation basse tension

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Country Link
EP (1) EP2497176B1 (fr)
CN (1) CN102668293B (fr)
DE (1) DE102009046305A1 (fr)
WO (1) WO2011054588A2 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013219965A1 (de) * 2013-10-01 2015-04-02 Bayerische Motoren Werke Aktiengesellschaft Traktionsbatterie mit integrierter Bordnetzbatterie
DE102014201362A1 (de) * 2014-01-27 2015-07-30 Robert Bosch Gmbh Verfahren zum Betrieb eines Bordnetzes
DE102014201354A1 (de) * 2014-01-27 2015-07-30 Robert Bosch Gmbh Bordnetz
DE102014201358A1 (de) * 2014-01-27 2015-07-30 Robert Bosch Gmbh Bordnetz und Verfahren zum Betrieb eines Bordnetzes
DE102014201360A1 (de) * 2014-01-27 2015-07-30 Robert Bosch Gmbh Bordnetz
DE102014201346A1 (de) * 2014-01-27 2015-07-30 Robert Bosch Gmbh Bordnetz
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WO2011054588A3 (fr) 2011-11-10
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CN102668293B (zh) 2016-05-18
CN102668293A (zh) 2012-09-12

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